Don't want to give too many details away so bits of info have been changed but the story remains the same. Basically I am a mentor for a student who is currently on placement with me. She's 34 years old, married with kids. All normal.
First couple of weeks were fine, no probs but then odd stuff started happening in our place if work that had never happened before. Starting with a sign appearing in the female toilets saying "please flush the bog after use". Everyone was questioning it because the wording was obviously not normal but the sign had been printed and laminated so looked as official as pos really. Nobody owned up to it. A week later the sign was taken down and a new one appeared reading something along the lines of "flush the big and get rid of any shit stains. Thank you". Again nobody admitted to it and the person in charge made a big deal of it saying whoever was doing it was risking disciplinary action. At this point my student kept asking questions about it and seemed to find it hilarious and was trying to figure out if anyone else found it funny. Other odd 'happenings' include a full loaf of bread being ripped apart and left stuffed in its bag and what we assumed to be food colouring in a bottle of milk in staff room. None of this shit happened before she got here but I felt bad blaming her because she actually seems as normal and nice as possible!
Latest incident was yesterday and was basically her laughing her head off quite hysterically because someone slipped. Obviously I've spoken to her but she remains as calm and collected as ever and shows the same confusion as everyone else but I just know it's her but can't explain why. All our magazines in the staff room get defaced with daft drawings etc too and in a conversion with another colleague she told then that people eating marmalade on toast makes her so angry she feels like shoving it down their throat. She laughed it off but it's still an odd thing to say no??